In the following reaction, oxygen is the excess reactant. SiCla + O2 SiO2 + Cl2 The table shows an experimental record for the above reaction. Experimental Record Trial Starting Amount of SiCl, Starting Amount of O2 Actual Yield of SiO, 150 g 200 g 49.2 g 1 75 g 50 g 25.2 g 2

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".